18-inch dishwashers: the opening each model actually needs.
In DishwasherFit's records, an 18-inch category dishwasher can have a different required opening width, height and depth from another machine in that category. Start with the narrowest clear cabinet measurements, then compare capacity and sound.
These are selected examples from our manufacturer-source catalog, ordered by brand and model. They are not a performance ranking or a guarantee of installation. Feature specifications do not resolve missing or conflicting opening measurements.
Links marked affiliate may earn us a commission. Payment does not change the selection criteria, measurements or order.
Opening sizes for all 14 18-inch records
Every 18-inch record in our catalog, in brand and model order. Each number links to its manufacturer source. “Unverified” means we have not found the figure, not that it is zero. Scroll sideways for all columns.
Measure the cabinet opening from the finished floor. Do not substitute the old appliance's body dimensions.
Check the largest plates and pans you use. Place-setting capacity is a standardized manufacturer figure, not a guarantee that every dish shape will load.
Check the utility route, door swing, mounting and any trim needed at the sides. An 18-inch machine is not an automatic replacement for a 24-inch opening.
Manufacturer specifications, checked September 20, 2026. Annual energy is a published estimate; sound ratings and drying names are not our test results.
Tradeoffs to check
Listed capacity is 10 place settings; check how your larger pans load.
Where to buy SPE53C55UC
We may earn a commission from qualifying purchases through links marked affiliate, at no extra cost to you.
Manufacturer specifications, checked September 20, 2026. Annual energy is a published estimate; sound ratings and drying names are not our test results.
Worth considering
Three listed racks provide a separate level for smaller items.
Published 44 dBA rating: a lower-noise option within this catalog.
Tradeoffs to check
Listed capacity is 10 place settings; check how your larger pans load.
Manufacturer specifications, checked September 20, 2026. Annual energy is a published estimate; sound ratings and drying names are not our test results.
Tradeoffs to check
Listed capacity is 8 place settings; check how your larger pans load.
Wi-Fi requires a separately specified module; confirm availability before buying.
Where to buy PDT145SGLWW
We may earn a commission from qualifying purchases through links marked affiliate, at no extra cost to you.
Recorded minimum opening: unverified × unverified × unverified inches (H × W × D). Check your actual opening; other installation conditions can block a match.
Manufacturer specifications, checked September 20, 2026. Annual energy is a published estimate; sound ratings and drying names are not our test results.
Tradeoffs to check
The listed arrangement has two racks, without a separate third rack.
Listed capacity is 10 place settings; check how your larger pans load.
Recorded minimum opening: unverified × unverified × unverified inches (H × W × D). Check your actual opening; other installation conditions can block a match.
Manufacturer specifications, checked September 20, 2026. Annual energy is a published estimate; sound ratings and drying names are not our test results.
Tradeoffs to check
The listed arrangement has two racks, without a separate third rack.
Listed capacity is 8 place settings; check how your larger pans load.
Manufacturer specifications, checked September 20, 2026. Annual energy is a published estimate; sound ratings and drying names are not our test results.
Tradeoffs to check
The listed arrangement has two racks, without a separate third rack.
Listed capacity is 8 place settings; check how your larger pans load.
Where to buy DW185SSADA
We may earn a commission from qualifying purchases through links marked affiliate, at no extra cost to you.
No. Compare the actual installation drawing, minimum and maximum opening heights, and your finished floor. Our low-counter guide explains why a body under 32 inches can require a taller opening, and the ADA dishwasher guide covers what the standard actually requires.
Is a third rack standard on an 18-inch dishwasher?
No. We show a rack count only when it is established in the reviewed source. “Not verified” is not a claim that a third rack is absent.
More 18-inch dishwasher questions
What size opening does an 18-inch dishwasher need?
“18-inch” is a category, not an opening size. Of the 14 records in our 18-inch category, 9 have a documented minimum opening: 17.7 to 18 inches wide, 32 1/8 to 32 1/2 inches high and 22 7/16 to 24 inches deep. The other 5 have no verified opening yet. Use the exact model’s installation drawing.
How tall is an 18-inch dishwasher?
The appliance bodies in our 18-inch records are 32 1/16 to 34 1/4 inches tall, but body height is not the space it needs. The documented minimum opening heights are 32 1/8 to 32 1/2 inches. Measure from the finished floor to the underside of the counter.
Will an 18-inch dishwasher fit in a 24-inch space?
Not as a direct replacement. An 18-inch machine in a 24-inch opening is a cabinet-conversion project: the remaining width, side support, mounting and trim need an installer’s plan.
Is an 18-inch dishwasher the same width as an 18-inch opening?
No. The bodies in our records are 17 1/2 to 18 inches wide, and the documented minimum openings are 17.7 to 18 inches wide. Check the exact model’s minimum opening against your clear cabinet width.
Keep checking before you order
Confirm the full model and finish, current stock, delivery to your ZIP, installation service, return terms and final price with the retailer. Our published annual energy figures are manufacturer estimates, not a prediction of your utility bill.
